Ryan O'NealMY FAMILY IS 'FALLING APART'

8/4/2011 3:45 PM PDT

Ryan O'Neal -- My Family Is 'Falling Apart'

Hours after one son was arrested for drug possession on Tuesday, his other son got into a gnarly head-on car accident -- and now, Hollywood legend Ryan O'Neal tells TMZ, his family is "falling apart."

The first son, 26-year-old Redmond O'Neal -- who has a long history with drugs -- pled "not guilty" to heroin possession and unlawful possession of a firearm this morning ... but Ryan tells us, the kid "has a real problem."

Ryan hasn't seen his other son -- 46-year-old Griffin O'Neal -- in years ... but thankfully, he heard through the grapevine ... Griffin wasn't seriously injured in Tuesday's head-on collision.